Resin structure keystone ornamentation



FIG. 1 is a perspective view of a resin structure keystone ornamentation showing my new design.

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof.

The phantom line representations in FIGS. 1-5 are exemplary and form no part of the invention. 

The ornamental design for a resin structure keystone ornamentation, as shown and described. 